Thermodynamic parameters of viscous flow for electrolytic solutions in N,N dimethylformamide—water mixtures

✍ Scribed by J. Doménech; J.M. Costa

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 294 KB
• Volume: 28
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(83)87015-7

✦ Synopsis

Transition-state treatment has been used for calculation of the contributions per mole of the solute. to the free energy of activation for viscous flow of lithium chloride, lithium nitrate and lithium, sodium and potasium perchlorates solutions in dimethylformamide-water mixtures. The values obtained increase with increasing dimethylformamide content in the solvent, except in the case of perchlorates, where a minimum in a water-rich region is observed. This behaviour is interpreted in view of the changes in salvation and molar volumes at intinite dilution of the ions in the different solvent mixtures. Finally, from the free energy-values at different temperatures. the estimated enthalpy and entropy of activation of viscous flow are analysed.